Gas furnace



May 26, 1931'. I g, T K 1,807,051-

GAS FURNACE Filed May 6. 1930' g Sheets-Sheet 2 Eatented May 2 6, V 7 if i i i I i i ff-U TED STAT-{ES P-Ar E Nr oFFIC Ef f GEORGE A. reor ersen raancrsoo, CALIFORNIA ens FURNACE I Application filed Maya, 1930'; s rial'no'. 450,218. My invention relates to improvements in upon the line 1-1 of Fig. 2 in-the direction furnace construction wherein'a combustlon lndicated; and V j r chamber 1s provided with'a'laterally extend- F 1g.2 1s a vert cal sectiontaken upon the ing expansion chamber and tortuous. expanline 2"2 of Flg. l in thedir'ection indicated.

sion passage to obtain a large volumefor ex- Referringrto the drawings, the numeral'l is pansion and arranged, to set up internal used to designate in general a combustion stresses and counter currents within the com: chamber provided with a suitable'gasf burner bustion gases to retard'the flow of gas witha 2 mounted within the bottom portion thereof. I minimum restriction of the'ar'ea of outlet, The burner 2 may be lof-anydesiredform and v v .The'primary object of my invention is to size and may be controlledinany desired mans A further object 1s to provide an improved the horizontaldimensions.

provide an improved gas furnace construcner. An air connection 3'is mountedto-open tion. iv i into the :bottom portion r of the'combustion 1 Another object. is to provide 'an improved chamber 1 to admit air'to support combustion furnace construction wherein" the normal upof fuel issuing from theburner, said, fuel beward movement of gases of combustion from ing supplied through a suitable supply pipe 4;, a gas burner is translatedto a lateral move- The combustionchamber 1 is preferably ment at substantially right angles to said norformed from sheet metal shaped to f substan: mal upward movement to retard the flow of tially rectangular cross section, and With its expanding gases. r rvertical dimensionsubstantially greater than furnace construction wherein a combustion An'vexpansion chamber6 is mounted upon" chamber is provided with a laterally extendone side of the combustion chamber 1. The mg expansion chamber communicating with chamber'6'1s preferably formed from sheet the combustion chamber and forming an exmetal and arranged to extendlaterally from 3 Q tension thereof to a obtain increased volume the combustion chamber, said expansion-Za for expansion and arrangedfto directthe chamber 6 communicating with'the combuse flow. of gases in a'maner to retard the rate'of tion chamber 1 through a slot-like opening flow with a minimum restriction of the area of 7 ve l y (1181308801 Wl hln h W ll Of t e outlet. chamber 1. The bot-tom of the" expansion 3 Another object is to providecankimproved cha 6 is g d g y ov I ea device ofvthe character described to obtain level 0ftheb11meF'2, t am r 6 prefincreased efliciency of combustion and inerably extendsupwardly to the top of the I creased heating efficiency. combustion chamber so. that the top of the A further object is toprovidean improved expanslon Chamber forms a colitlnlwtlfin 1 '35 furnace structure of'simple, compact, and elf th t p f the combustion c mbe 'The I ficient construction r V r V opening 7 1n the wall of the combustion cham- A still further object is to provide an im-. ber x substantmuy fi h f proved furnace which may be rapidly heated Th fhf fm i ipi g i fi f gg v to full operative eiiic'iencyand which effectuy Barre-W W1 lespec O 1 S v.61 18a 1 a One slde wall of the expansion chamber 6 any Prmnts Condensation Within the m is preferably arranged-at right angles to the nace V a L plane of the ad acent wall of the combustionr accomplish these n other 1 by chambeigvand isarranged to matchwith the means of the improveddevice disclosed in the adjacent g b the Opening 7 :The oppo 1 45 ra i g a P of the Present PP site wall is preferably formed from twowall '95 cation w e n like Characters f, Tfe'ieme portions-6 and 6 converging toward a line are used t designate mi pa g of intersection within the chamber 6 to form out the specification and drawings and in arestrictionwithin the expansion chamber, at

4 a point spaced from the opening 7. The wall which 7 v 50 'Fig. 1 is a transverse sectionalview taken portion 6 inclines inwardly from the adj a- Cent edge of the opening 7 and the wall portion 6 inclines in the opposite direction to the end of the chamber 6. An outlet opening Sis formed in thechamber "6, preferably in the wall portion 6" immediately beyond the restriction formed bythe wall portion 6'.

The opening; 8: preferably extends-Vertically the fu'llheight of the expansion chambenand 1 between "spaced parallel wall portions. is mounted with one end commun cating with is made'relatively narrow so asto provide a..

vertically disposed slot-like outlet. V r s A tortuous gas expansion passage 9"for'm'ed the outlet opening 8, the vertical wallsof said passage 9 being spaced substantially the same: as the widtlrofthe' opening 8, and ex.-

tending the full height of the expansion chamber. The passage isextended. beyond the @utemnd: oft-the expansion chamber and is shaped to curveor'extend around: theend ofthe expansion'in spaced relati'onto the walls thereofito form a relatively restricted air "passage 11 betweenthe adjacent walls of thepassageand expansion chamber, a

" A tortuousqfl'ue pa'ssage,: p'reierably consisting ot a, pair of vertically disposed panal lel'flue chambersm and 1 3, -is mounted with the lower end of the chamber 12 connectedto communicate with'the lower portion set the t'ortuous expansion passage?) through a suit able connection: 14 connected into;- said pas-' sage at' the endrremotenfrom theopeniiig &ot the expansion chamber; The chambers; 12

and 13 are=connected atthe top by suitable connecting passage 116;" A'stack'connectiomhZ isoonnected into the bottomoii the chamber -13','said connection 17 beingextendedto any suitable stack. Thechanrbers 12 an'cl113' are preferably-of substantially; the sameahfeight 4n n V J and arespacedifrom eachother and tro'nnthe as the expansion chamber Sand-passages. 9;

adjacent portion oi the passage l9 to pro-' 1 vide airr passagesthrouglr which may'cin V cul'ateupward l'ypastthe-he'ated walls ot the chambers. I V i y The combustion chamber 1 and expansion chamber 6, together with'the' tortuous pas- V sage 9 and flue chamberslQi and 1:3',lare:en-

casedtogether in an outer' casing '19 preferablyofdouble walled sheet metalrstruc faces thereof; the heatedair'rising upwardly through the casing and passing outwardly througha suitable outlet 21 mounted wit'hin the top of the-casing, s 1 In operation fuel issuing from the I burner 2 is ignited and burns in the ordinary manner, air beingadmitted 'through the connec tion to obtain a complete combustion of the fuelr Theheated products of combustion rise verticallyfrom the'burner 2 toward the top offthe' combustion chamber 1 at the same; j.

time expanding within the chambervl." The normaktrend of movement maybe likened to asheetuof gaseous products spreadin a horizontal plane across the combustion. chamber and rising Vertically toward 'the'top of the chamber. As the risingproducts move past the slot like opening 8 in the'jwall of the chamber, the gases expand and are moved laterally through said opening into the expansion chaniber. This: expansion "and How througni the opening 8 occurs. along the hull height: of tliefopeningi 8 an d expansion chain:

herb,-andthemoveinent oi the gases-into the expansion:chambeinmay be likened to: a

sheet-of; gaseous material'disposed: ina vertical plane and movingzhorizontallytintos-the expansion chamberz; Thus the v movement. of

gases 7 is" translated" f'rom wa; normalgupwaa'd trend to alaterali-movement in as horizontal direction along aiverti'cal' plane at substantially right angles to the normal upward movement. The' 'resistance ot the' upwardly rising-"gases: to lateral: displacement together to this translation fot-niovement retards the flow of ga'sestrom. the combustion: chamber sutiiciently to insure arcomplete' and: efficient combustion of fuel 7 within. the; combustion chamber @At. thesame time, thes relatiyely' V large area "oh the vertical slot 8' permitsrthe gas: to: expand: into? the expansionchamber G With utvcreating sufficient back pressure within the combustion chamberto'cause-hove eringi flame land inefiicient; combustion; I the etfeotiheing to provide anhincreased Volume i'OI e'X-paHSlbn: of the gaseswhilestrll operat ing; to retard; the flow sufficiently to insure efiicl'ent combustion. without causing back l'et 'oii relatively smalLand nestrictedareaa Theefgases flowing intothe expansion;

chamber 6 expand withinithez-chamber and intoithetortuous expansion passagelQthrough the outlet ,..8.= Gases; expandingwithin the 7 end of the chamber 6 remotefrom theopening 8must expandz against theapressure of incoming gases in order. toreach. the outlet opening ,8. The result" is that the incoming gases are crowded. toward the side of the chamber oppositeithe outlet opening 8-, and

the flow of incoming gases is retardeclby theexpansion of gases within the expansion 1 chamber and at the same time; said 1nflow ing gasesretard the expansionof the gases 1.

withi'nwthe chamber and? retardtheflow of said" gasesto the outlet; This act-ion is i'n' creased by the structure and arrangement of thefwallportions 6 and 6 'as above zdescrihe'd s The' inclined; portioni 6, .de-

with 'ed'dy curre'ntsandginternal resistance pressuresuch as occursin the case-of'airoutfleets the incoming gas toward the side of the chamber 6 oppositethe outlet opening '8', and at'the same time causes a slight restriction operating to impart an "increased velocity to the incoming gases passing the outlet 8. The opening 8 is formed in the wall 6" immediately beyond the edge of the wall 6 so that said wall overhangs the ad jacent edge of the wall portion 6 whereby the incoming gas is deflected past the stream of'outfiowing gases and insuring an eiiicient circulation of gas through the-enlarged portion of the chamberfi beyond the outlet 8.

The gases entering the expansion passage 9 continue to move through said passage as a vertically disposed sheet moving horizonthan by a positive restriction of the area of outlet. This structure and arrangement permits the expansion chamber and expansion passage 9 to be heated very. rapidly, thereby preventing condensation of moisture from the gases when the furnace is started from a cold condition.

The tortuous flue passage chambers 12 and 13, with their connecting passages 14 and 16, receive the gases after they have been partially cooled during their movement through the expansion chamber and expansion passage. The movement of the gases is trans lated from the horizontal movement wlth n the expansion chamber to an upward vertical movement within the chamber 12 and a downward vertical movement in the chamber 18. The connecting passages 14 and 16 are made of relatively large area, as compared to the size of similar passages in furnace structures heretofore embodying atortuous flue,in order to impose as little positive restriction as possi+ ble to flow of gases through the furnace. The restriction of the outlet area throughthe connections 14 and 16 occurs after the gases have been afforded time to fully'expand and to give up the greater'portion of their heat to the walls of the combustion and expansion chambers and their tortuous passage 9.

For heating purposes, air is admitted into the casing 18 through the air inlets19. v This circulates upwardly through the casing 18 around the several chambers and passages and through the air circulating spaces be;

tween the chambers 12 and 13, and through the air space 11 between the walls of the chamber 6 and'passage 9. Theairisthus V exposed to contact with a Wide area of heated surface, therebycausing the air to be rapidly and'efiiciently' heated. The heated air passes outwardly through the outlet 21 for delivery to rooms to be heated in any convenient mannen' While I have illustrated and described what I now regard as the preferred embodiment-of my invention, the device is of course subject to modification in numerous ways without departing from the spirit of my invention.- 1 therefore do not wish to restrict myself to the specific details of construction and arrangement disclosed, but desire to avail myself of all modifications which may fall withinthe scope of the appended claims. c

'Having thus described my invention, what 7 I claim as new and desire to secure by Letters Patent is 11A as furnace com 'risin a combustion 1 o V a chamber prov1ded with a burner mounted within the bottom thereof; anexpansion chamber extending laterally from the combustionchamber and communicating with said combustion chamberthrough an. opening having the greatest dimension vertically disposed in the side of the combustion chamber to translate a normal upward movement 7 of gases of combustion wlthln the combustion chamber to a lateral movement in a plane substantially at right angles to said normal upward movement; and a tortuous passage connected into the expansion chamber to con duct the gases to a stack.

2 2. A gas furnace comprising a combustion chamber provided with a burner mounted within the bottom thereof; an expansion chamber extending laterally from the combustion chamber and communicating with said combustion chamber through an opening having its greatest dimension vertically dis posed in the side of the combustion chamber, to translate a normal upward movement of gases of combustion, within the combustion chamber, to a lateral movement in aplane substantially at right angles to said normal upward movement; and a tortuous passage connected into the expansion chamber at a point intermediate to the ends of the expansion chamber to permit expansion therefrom along a vertical plane.

upward movement, said expansionchamberbeing provided with a restricted portion bea tween the combustion chamber and the outer V en-dof the expansionchamber and a tortuous passage connected into the er'rpansion chamher at a point intermediate the ends of the expansion chamber. to permit expansion therefrom along a vertical plane.

4. 'A gas furnace comprising a combustion chamber provided with a burner mounted within. the bottom thereof an expansion. chamber extending laterally from the'com-V bustion chamber and communicating with the combustion chamberthrough an opening having. its greatest dimension vertically disposed .in the side of the combustion chamber to translate normal'upward movement of gases of combustion," within thecombustion chamber, to a lateral movement in a plane substantially at right angles tosaid normal upward movement, said expansionchamber being provi-dedwith a restricted portion between the combustion chamber and the outer endof the expansion chamber; and a tortuous assage connected into the expansion cham "er at a point immediately outwardly fromthe restricted portion of the expansion 'chamber. 7 v

5. A gas furnace comprisiuga com ustion chamber provided with a' burner mounted within the bottom thereof; expansion chamber extending laterally from the'combustion chamber and communicating with the combust-ion chamber through a vertically disposed slot in the side of the combustion chamber to translate a normal upward movement of gases of combustion within the combustion chamber to a lateral movement in a plane substantially at right angles to said normal upward movement, said expansion.

chamber being provided with a restricted portion spaced from the combustion chamber; a tortuous expansion passage connected into the expansion chamber through a vcrti cally disposed slot within the restricted portion of the'expansion chamber, said slot eX- tending substantially the full height of the expansion chamber to permit lateral expansion and movement of the gases from the ex- 7 pension chamber along a vertical plane. 7

6. A. gas furnace comprising a combustion chamber provided with a burner-inounted within the bottom thereof; 7 an expansion chamber-extending laterally from the com bustion chamber and communicating with intothe expansion chamber through a vertibustion chamber at v the-combustion chamber through a vertically cally disposed slotwithinthe restricted portion of theexpansion; chambe said s ex tending. substantially the full height of the Xpansion chamberto pe mit lateral exp ts sion and movement of the gases from theex- .-p ns n cham er along ertical p a-ne;iand

a tortuous flue 'passage'connected'to the tortuous expansion passage to translate the lateral movement of gases t9 vertical move:

ment. e 7. A gas furnace compr sing a combustion chamber prov ded w th a burner mounted within the bottom thereof; an expansion I chamber extending late-rally from the @0111- I communicating With l' pDSdslotin theside-of theoombustion chamber to translate a normal upwardmovement of gasesof combustion within the combustion jchamber to a lateral movement plane substantially at right angles to said normal upward movement, said expansion chamber being provided with a restricted portion spaced from the combustion chamher; alt tu s expansion pa age conne ted intothe expansion chamber tl irough a vertically. disposed slot within the' rest-ricted portion. of the expansion chamber, said slot extendin substantially the full; height Of the expansion chamber to permit lateral expan-' sion and movement, of the gases'from; the expans on chamber along a vertical plane; a tortuous flue passage connected to the tortuous expansion passage, said flue passage com prising a vertically disposed passage provided with a connection, adjacent to the bottom thereof, opening into the'bottom of the expansion passagqand a second vertical flue passage spaced from the first flue passage and provided with azconnectionvat thetop to communicatewith the topuof said first flue passage, and a stack outlet for-med at the bottomYof' the second flue passage, said V flue passagesoperating to translate the lateralmovement of gases in the expansion passageto vertical movement in said flue passages. V

8. .A- gasfurnace comprising a combustion chamber provided with a burner mounted withinf the bottom thereof an expansion chamber extending laterally from one side of the combustion chamber; a gas outlet formed infthe side ofthe combustion chamber and communicating with the expansion chamber, said out-let comprising a vertically disposed slot-like-iopening inthe side of the combustion'chamber a'ndextending substantiallyv the full height of the expansion chains ber totrans'late a normal upward movement of gases of combustion within thecombustion chamber to alateral movement in a plane substantiallyat right angles to said normal upward movement; angularly dis-s posed wallportionsforming one side of the expansion chamber and converging toward a "tion chamber to a lateral movement in a line of intersection within the expansion chamber and having a vertically CllSPOSQCloutlet opening formed in one ofsaid inclined wall portions adjacent the line of intersecv tion; and a tortuous expansion passage communicating with the expansion chamber through said vertical 'slot.

9. A gas furnace comprising a combustion I chamber provided with a burner mounted within the bottom thereof: an expansion chamber extending laterally from one side of the combustion chamber; a gas outlet formed inthe side of the combustion cham her and communicating with the expansion chamber; said outlet comprising a vertically disposed slot-like opening in the side of the combustion chamber and extending substantially the full height of the expansion chain her to translate a normal upward movement of gases of combustion within the combusplane substantially at right angles to said normal upward movement; posed wall portions forming one side'of the expansion chamber and conver ingtoward a line of intersection within the expansion chamber and having a vertically disposed outlet opening formed in one of said inclined wall portions ad] acent the line of intersection; a tortuous expansion passage communi-- chamber extending laterally from one side of the combustion chamber; a gas' outlet .formed in the side of the combustion cham! her and communicating with the expansion chamber, said outlet comprisinga vertically disposed slot-like opening in the side of the, combustion chamber and extend ng substai tially the full height of the expansion chamber to-tr anslate' a normal upward movement of gases of combustion within the combustion; chamber to a lateral movement in a plane substantially at right angles to said normal up ward movement; angularly' disposed wall portions forming one side of the expansion chamber and converging towardqa'line of intersection within the expansion chamber and havin a vertically disposed'outlet opening forme in one of said inclined wall portions adjacent the line of intersection; a tortuous expansion passage communicating with the expansion chamber through said vertical slot,

said passage being of substantially the same height as the expansion chamber and being 'angu'larly disa combus tion chamber provided with a burner mount ed within the bottom therof; an expansion" shaped to extend around the outer end of said expansion chamber to conduct gases laterally along a vertical plane and to provide a restricted air circulating space between the walls of said expansion chamber and passage;

and a tortuous flue passage mounted adjacent the expansion passage and provided with a connection communicating with said expan sion passage.

11. A gas furnace comprising a combustion chamber provided with'a burner mounted within the bottom thereof; an expansion chamber extending laterally from oiie'side of thecombustion chamber; an outlet formed in the side of said combustion chamber and opening into the expansion chamber, said outlet comprising a vertically disposed slot in the side of the combustion chamber and extending substantially. the full height of the expansion chamber to translate a normal upward movement of gases of combustion withinthe combustion chamber toa lateral. move-f ment within the expansion chamber in a plane substantially at right angles to said normal upward IHOVE-IIIGIllLSllCl expansion chamber being provided with one side wall at right anglesto the side of the combustion chamber and the opposite wall being formed in angularly disposed wall portions converg= ing toward a line of intersection with the chamber to form arestriction intermediate the-ends of the chamber; and a tortuous passage connected into the expansionchamber' through a vertically disposed slot formed-in theinclined wall portion remote IEIOHltllG combustion chamber. f '12. A gas furnace comprising acombustion chamber provided with aburner'inounb j ed within the bottom thereof; an expansion 1 chamber extending laterally'from one side of the combustion chamber; an outlet formed in the side of said combustionphaniber and opening into the, expansion chamber, said outlet comprising a vertically disposed slot in the side of the combustion chamber and'extending substantially the full height of the expansion chambertotranslate a normal upward movement of gases of combustion within the combustion chamber to alateral movement within the expansion chamber in ap'lane substantially at right angles to said normal upward movement, said expansion chamber being provided with one side wall at right angles to the side, of the combustion chamber and the o osite wall bein formed; in an ularly disposed wall portions converging to-' ward a line ofintersection within the chamher to form a restriction intermediate the ends of the chamber; a tortuous passage connected into the expansion chamber through a vertically disposed slot formed in the inclinec, wall portion remote from the combustion "chamber, the adjacent end of the other inclined wall portion being extended to, inwardly ofiset relation to theedgeof'the outer inclined wallportion to deflect the gases enter: ing the expansion chamber past the opening into the'tortuous passage. 1 V

13. In a gas furnace, the combination'with {a combustion chamber having a burner mounted within the bottom portion thereof,

f of an expansion chamber formed upon one side of the combustion chamber and communicatlng with sald chamber through slotlike opening in the side of said combustion chamber, said opening having its vertical dimension relatively great with respect to its horizontal dimension to translate a 'norma upward movementv of gases ofcombustion within the combustion chamber to a lateral movement in a vertical plane substantially at right angles to said upward movement 7 during the course of said upward movement.

14."In a gas furnace, the combination with a; eombustion chamber having a burner. mounted within the bottom portion therof of an expansion chamber formed upon one side "of the COIllbHSill'OIl chamber and c'ommunieating with said chamber through a verti-.

cally disposed slot-like opening in the side of said combustion chamber to translate'a normal upward movement'ofgases of combustion within the combustion chamber to a lateral movement in a plane substantially at right angles to said upward movement: and a tortuous expansion passage connected into one side of the expansion chamber.

through a vertically disposed slot-like opening formed therein, theopenings andthe tortuous passage being of substantially the same height as the expansion chamber;

15. In a gas furnace, the combination with a combustion chamber having a burner mounted within the bottom portion thereof, of anexpanslonfchamber formed upon one s de of the combustion chamber and communicating wlth said chamber through a vertn,

cally disposed slot-like oi'Jening'in the side of said combustion chamber to translate a normal upward movement of gases of combustion within the combustionchamber 1 to a lateral movement in a plane substantially chamber, and to forma restricted passage within said expansion chamber, toobtain an increased velocity of gases entering the expansion chamber past the openingfrom said expansion chamber into the expansion passage and to set up internal stresses within the gases, and thereby retard the flow of .gas moving outwardly from the expansion 1 chamber into said tortuous expansion pas-j sage.

16. In agas furnace, the combination with ing with said combustion chamber through a slot-like opening having a vertical dimension great with respectxto its horizontaldimension; and a-tortuous'pas'sage connected into onesideof the expansion chamberandcommunicating with said expansion chamber through a slot-like opening substantially the same height as the expansion chamber and of relatively narrowwidth. 1

1.7. In a gas furnace, the combination with a combustion chamber provided with a burns er mounted within the bottom thereof,'of an expansion chamber mounted upon'oneiside of the combustion chamber and communi chamber through a slot-like opening having a vertical dimensi'on great with respect to,itsi-horizon-.- tal dimension; a tortuous passageconnected eating with said combustion into one side of the expansion chamber and a combustion chamber provided with a burn= er mounted within the bottom thereof, of

' an'expansion chamber mounted upon one side it of the combustion chamber and communicat-- communicating with salid'expansion chain 7 her through a. slot-like I opening of substan 1 tlally the same height as the expansion chamher and of relatively ,inarrow width: saidl tortuous passage being of substantially, the same height as'the expansion chamber and being shaped to extend around the outer end 7 of the expansion passage with the adjacent walls of the-passage and expansion chamber 1n spaced relation to PIQVldB' an air clr'culating passage therebetween.

18. In a gas furnace, the combination with a combustion chamber provided with a burn "er mounted wit-hinthebottom thereof, of an expansion chamber" mounted: upon one side of the combustion chamber-and communicating'with said combustion chamber through a slot-like opening having avertical dimension great with respect to its horizontal diff.

mension; a" tortuous passage connected into i V one'side of the expansionchamberand com.- v V municatlng' with 'saldjexpanslon chamber I through aslot-like opening of substantially the same height-asothe' expansion chamber and of relativelynarrow width, said tortu-;- ous passage being of substantiallythe same 3 height as the'expaj-nsion chamberand being shaped to extend around the outer end of the expansion; passage :with the adjacent walls ;of the-passage and expansionichamben in spaced relation to'provide an air circulating passage therebetween;; and a'tortuousflue passage'connected. into'the lower portion'off 'the tortuous passage at the end remote from.

the expansion chamber. a a

In witness whereof, I hereunto set my signature., t 7

I GEORGE A. TUCK. 

